Safety Features, Controller LEDs | Siemens 125-5050 instruction

Chaper 4 – Troubleshooting

Safety Features

The controller board stores the controller's address, applications, and point values. In the event of a power failure or a reset, these values are retrieved from the controller's permanent memory and are used by the controller unless overridden by a field panel. If one of the following conditions occurs, the controller will activate safety features present in its fail-safe mode.

Sensor failure.

Loss of power. Upon controller power loss, communication with the controller is also lost. The controller will appear as failed (*F*) at the field panel.

Controller LEDs

NOTE:

The TX and RX LEDs indicate communication over the FLN.

To determine if the controller is powered up and working, verify that the Basic Sanity Test (BST) Light Emitting Diode (LED) is flashing ON/OFF once per second. The controller contains seven LEDs located on the circuit board. See the Controller LED lndicators [ 12] section of Chapter 1 - Product Overview [ 9] for more information about LEDs.

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Siemens Industry, Inc.	BACnet ATEC Owner's Manaul
125-5050, Rev. AA	4/20/2010

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Siemens 125-5050 owner manual Safety Features, Controller LEDs

Contents

Siemens Industry, Inc Siemens BACnet AtecPage Copyright Notice Service StatementFCC Regulations Credits To the Reader Table of contents Using the Controller as a Point Extension Device Manual Organization How To Use This ManualManual Conventions Where to Send Comments Manual SymbolsGetting Help Application Description Product OverviewOrdering Notes BACnet Atec Electronic Output Applications Digital Hardware InputsHardware Outputs Analog Application Power Wiring Indication Communication WiringController LED Indicators Controller LEDs Related Equipment Temperature SensorsRoom Temperature Sensor Duct Temperature Sensor Basic Operation Applications Fail-safe Operation Heating and Cooling SwitchoverCalibration Damper Status Operation Hot Water Reheat Modulate Damper During Heating Mode optionalElectric Reheat Application 2861 VAV Cooling or Heating Application 2860 VAV Cooling Only Baseboard Radiation Application 2863 VAV with Hot Water ReheatElectric Heat Interlock Fan Operation Application 2864 VAV Series Fan Powered with Electric Reheat Insert TEC2564CD Insert TEC2566CD Insert TEC2567CD Application 2897 Slave ModeUsing Auxiliary Points Using the Controller as a Point Extension Device Applications Descriptor Address Application Description Point Database Descriptor Address1 Descriptor Address1 Application Description MTR2 Timing MTR SetupVLV POS VLV1 POS CTL Flow MIN Switch LimitSwitch Time Flow Setup Switch DbandCAL Setup CAL Timer Basic Service Information Chaper 4 TroubleshootingPreventive Maintenance Controller LEDs Safety Features Glossary Loopout Override switchField panel Lps Unbundle Slave modeStand-alone control Terminal Equipment Controller Index Duct temperature sensor, 15 RTS Index Communication wiring Wiring Power wiring 125-5050, Rev. AA